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Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / tools / testing / selftests / bpf / prog_tests / trace_printk.c
1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2020, Oracle and/or its affiliates. */
3
4 #include <test_progs.h>
5
6 #include "trace_printk.lskel.h"
7
8 #define SEARCHMSG       "testing,testing"
9
10 static void trace_pipe_cb(const char *str, void *data)
11 {
12         if (strstr(str, SEARCHMSG) != NULL)
13                 (*(int *)data)++;
14 }
15
16 void serial_test_trace_printk(void)
17 {
18         struct trace_printk_lskel__bss *bss;
19         struct trace_printk_lskel *skel;
20         int err = 0, found = 0;
21
22         skel = trace_printk_lskel__open();
23         if (!ASSERT_OK_PTR(skel, "trace_printk__open"))
24                 return;
25
26         ASSERT_EQ(skel->rodata->fmt[0], 'T', "skel->rodata->fmt[0]");
27         skel->rodata->fmt[0] = 't';
28
29         err = trace_printk_lskel__load(skel);
30         if (!ASSERT_OK(err, "trace_printk__load"))
31                 goto cleanup;
32
33         bss = skel->bss;
34
35         err = trace_printk_lskel__attach(skel);
36         if (!ASSERT_OK(err, "trace_printk__attach"))
37                 goto cleanup;
38
39         /* wait for tracepoint to trigger */
40         usleep(1);
41         trace_printk_lskel__detach(skel);
42
43         if (!ASSERT_GT(bss->trace_printk_ran, 0, "bss->trace_printk_ran"))
44                 goto cleanup;
45
46         if (!ASSERT_GT(bss->trace_printk_ret, 0, "bss->trace_printk_ret"))
47                 goto cleanup;
48
49         /* verify our search string is in the trace buffer */
50         ASSERT_OK(read_trace_pipe_iter(trace_pipe_cb, &found, 1000),
51                  "read_trace_pipe_iter");
52
53         if (!ASSERT_EQ(found, bss->trace_printk_ran, "found"))
54                 goto cleanup;
55
56 cleanup:
57         trace_printk_lskel__destroy(skel);
58 }
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